Segments (Details) $ in Millions	3 Months Ended
	Apr. 30, 2020 USD ($) segment	Jan. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 588.9	$ 600.5
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	457.9	467.4
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	425.0	434.2
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	32.9	33.2
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	78.7	75.8
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 52.3	$ 57.3